FYI In the Integrated Control and Block Descriptions Manual. there is a table in the CALCA Block sections that has this information along with the other differences between a CALC,CALCA,MATH, and LOGIC block Walter Scott nick.maher@xxxxxxxxxxxxxx wrote: I've long thought we should check our Interlocks / PSD's at some prescribed interval/function of modification......... Good catch. -----Original Message----- From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On Behalf Of terry.lloyd@xxxxxxxxxxxxxx Sent: Monday, September 18, 2006 4:06 PM To: foxboro@xxxxxxxxxxxxx Subject: [foxboro] Warning - potential CALC problems I just wanted to communicate an issue to you that we recently discovered on our Foxboro system at Dow Corning, Barry. So this note is intended to raise awareness, share the learning, and alert you to a potential problem on your own systems. One of our Systems Engineers came across some CALC blocks that didn't work as expected. On investigation he found that they had been coded with dual operands, e.g. OR BI01 BI02. This facility is only available on the CALCA block, the CALC block will only use the first operand, the second is treated as a comment - there is no warning when typed in the ICC. This meant that several trip group blocks were only grouping half the inputs! e.g. OR BI01 BI02 - BI02 is ignored OR BI03 BI04 - BI04 is ignored OR 2 OUT BO01 In order to check our complete system I exported the CALC block (>1400 blocks!) out of FoxCAE into a spreadsheet and used some vba to search for spaces (only one space then ok!) Regards =20 Terry=20 Terry Lloyd, Systems Engineer ____________________________________________________________ =20 =20 _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html =20 foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: = mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Djoin to unsubscribe: = mailto:foxboro-request@xxxxxxxxxxxxx?subject=3Dleave =20 _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave --------------------------------- Yahoo! Messenger with Voice. Make PC-to-Phone Calls to the US (and 30+ countries) for 2¢/min or less. _______________________________________________________________________ This mailing list is neither sponsored nor endorsed by Invensys Process Systems (formerly The Foxboro Company). Use the info you obtain here at your own risks. Read http://www.thecassandraproject.org/disclaimer.html foxboro mailing list: //www.freelists.org/list/foxboro to subscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=join to unsubscribe: mailto:foxboro-request@xxxxxxxxxxxxx?subject=leave